Hardrock 100 - Elevation Profile, Aid Stations and Cutoffs
- Silverton, Colorado, USA
- 161 km
- 10,000 m D+
- 6 aid stations
Map, profile and checkpoints Map · checkpoints · forecast opens Jun 30 Race-day forecast is live
Race-day conditions
Weather, daylight and your arrival time at all 8 checkpoints, set to the 06:00 start.
- Start
- 06:00
- Daylight at the start
- 05:56-20:35
- Aid stations
- 6
Course profile
Silverton, Colorado, USA
- Distance
- 161 km
- Elevation
- +10,000 m -10,000 m About 62 m of climb per km
- Highest point
- 4,282 m Handies Peak
Next edition Fri 9 Jul 2027 · 06:00
- Start
- Sunset 14h35 after the start
- Winner ~22h30 22h30 after the start
- Sunrise 23h57 after the start
- Mid-pack finish UTMB Index 500 41h18 after the start
- Cutoff 48h after the start
A mid-pack runner spends about 12h05 in the dark.
The Hardrock 100 is a 161km loop through the San Juan Mountains of Colorado with around 10,000m of elevation gain and loss, starting and finishing in Silverton. The cutoff is 48 hours, and the highest point is the summit of Handies Peak at 4,282m - the race spends most of its time above 3,000m.
Hardrock alternates direction each year (clockwise and counterclockwise) and finishes when runners kiss the Hardrock - a painted boulder in Silverton. Altitude is the defining factor: the course average is around 3,400m, and weather can swing from heat to lightning, hail, and snow in a single afternoon. Ouray, Grouse Gulch, and Sherman are the main crew points.
Data is approximate and courses change between editions - always verify against the official race guide.
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Course math
Four numbers worked out from this course's distance, elevation and checkpoints.
TrailMath effort-km
311 effort-km
About 41 h for a mid-pack finisher (index 500). Not a pacing guarantee.
Distance + gain ÷ 100 + loss ÷ 200, beside ITRA's gain-only km-effort. Model TM1.0.
How TrailMath works →UTMB Index category
100M
261 km-effort (distance + gain ÷ 100). Calculated from the course figures, not an official classification.
Estimate your UTMB Index →Biggest climb section
+2,500 m
Cunningham Gulch → Ouray · km 14–42
The largest gain between two checkpoints, not one continuous climb.
Biggest descent section
−2,800 m
Cunningham Gulch → Ouray · km 14–42
The largest loss between two checkpoints. ITRA's km-effort ignores descent; TrailMath counts it: 311 km-effort.
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~38 weeks · peak ~8 h/week · 5 run + 2 strength days
For a 161 km race, aim for about 12 h/week at peak. Set your availability to 14 h/week in the app for the headroom to build there gradually.
Typical structure for your volume - your live plan adjusts sessions inside each week.
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Aid stations and checkpoints
| Checkpoint | Km | Cumulative gain (m) | Cumulative loss (m) |
|---|---|---|---|
| Start - Silverton Services not published | 0 | 0 | 0 |
| Cunningham Gulch | 14 | 1,200 | 500 |
| Ouray Crew Drop bag | 42 | 3,700 | 3,300 |
| Engineer | 60 | 5,700 | 4,200 |
| Grouse Gulch Crew Drop bag | 74 | 6,600 | 5,700 |
| Animas Forks | 90 | 8,100 | 6,400 |
| Sherman Crew Drop bag | 109 | 9,300 | 8,200 |
| Silverton (Finish) Crew | 161 | 10,000 | 10,000 |
Data is approximate and courses change between editions - always verify against the official race guide. Source: official race guide, verified June 12, 2026 - Official race website
FAQ
How long is Hardrock 100 and where is it?
The Hardrock 100 covers approximately 161km (about 100 miles) in a loop through the San Juan Mountains of Colorado, starting and finishing in Silverton. The direction alternates each year.
How much elevation gain does Hardrock 100 have?
Hardrock has around 10,000m (roughly 33,000ft) of cumulative elevation gain and the same amount of loss over 161km, at an average course elevation of around 3,400m.
What is the cutoff time for Hardrock 100?
The Hardrock cutoff is 48 hours. Winning times are typically around 22-23 hours, reflecting the extreme altitude and terrain.
What is the highest point of Hardrock 100?
The highest point is the summit of Handies Peak at 4,282m (14,048ft), a full fourteener crossed mid-race. The course average elevation is around 3,400m.
How many aid stations does Hardrock have and which allow crew?
The checkpoint table lists 6 major aid points between the start and finish in Silverton. Crew access is allowed at Ouray (42km), Grouse Gulch (74km), and Sherman (109km), which also take drop bags. Access roads are mountain roads - allow generous travel time between stations.
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